Bicycle Bell Near Brake Lever for Simultaneous Operation
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Solution Overview
Problem
Conventional bicycle bells mounted on handlebars require riders to temporarily disengage from the brake lever to operate, posing safety concerns when braking.
Innovation Solution
A bicycle bell is integrated near the brake lever, allowing for easy manipulation while braking, with a spring-biased striking mechanism that produces two distinct tone sequences in a single operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bell is mounted on the handlebar beyond the reach of the thumb, then the bell can be operated with the thumb, but the rider must temporarily disengage from the brake lever, compromising safety
Solution Approach 1:
The bell is mounted in the vicinity of the brake lever, merging the bell operation and brake operation into the same hand control zone. This allows the rider to operate both the bell and brake lever simultaneously with the same hand, eliminating the need to disengage from the brake lever when pressing the bell lever.
2Ease of operation
If the bell is mounted near the brake lever, then the rider can operate both bell and brake with the same hand, but the bell structure becomes more complex
Solution Approach 1:
The bell lever serves multiple functions: it acts as both the bell activation lever and the brake activation lever. By making the bell lever and brake lever operable by the same hand simultaneously, the system achieves multi-functionality without requiring separate control mechanisms, thus managing complexity while improving ease of operation.
3Device complexity
If the clapper is exposed, then the striking mechanism is simple, but the clapper is vulnerable to damage from rain, dust, and other environmental elements
Solution Approach 1:
The clapper is nested within the bell housing structure. The housing provides a protective enclosure that shields the clapper from environmental elements such as rain and dust, while still allowing the clapper to move freely for striking the bell drum when activated.
Solution Approach 2:
The bell housing acts as a protective shell that encloses the clapper mechanism. This shell structure protects the internal components from environmental damage while maintaining the functional movement of the clapper through controlled openings or gaps in the housing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables safe and efficient operation of the bell while braking, providing effective warning tones without compromising control of the brake lever, and protecting the clapper from environmental elements.
Implementation Method 1
a resilient clapper 62 opposite the bell lever 61 and extending through an elongated transverse opening between both sides of the upward extending flange 22 to contact one side of the guide member 4
Implementation Method 2
An expansion spring 7 has one end anchored in the cavity 63 and the other end urged against an inner wall of the upward extending flange 22 to rest upon an internal shoulder of the channel 21
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A bicycle bell includes a housing (2) mounted on a handlebar and comprising a channel and an upward extending flange (22) partially surrounding a top of the channel; a guide member (4) secured to the housing (2); a drum (5) secured to and covering the guide member (4); and a spring biased striking device (6) mounted on the channel and comprising a bell lever (61) and an opposite clapper (62) extending through the flange to contact the guide member (4). Pivoting the bell lever (61) about the channel will pivotably move the clapper (62) to strike a first position on the drum (5) after passing the guide member (4). Releasing the bell lever (61) will return the clapper (62) to its inoperative position after passing the guide member (4) and striking an opposite second position on the drum (5). The bell is easy to manipulate with the same hand squeezing the brake lever.